CN102300038B - Camera head - Google Patents
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- CN102300038B CN102300038B CN201110177469.9A CN201110177469A CN102300038B CN 102300038 B CN102300038 B CN 102300038B CN 201110177469 A CN201110177469 A CN 201110177469A CN 102300038 B CN102300038 B CN 102300038B
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- 230000008569 process Effects 0.000 claims abstract description 21
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- 230000035945 sensitivity Effects 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 description 10
- 238000003384 imaging method Methods 0.000 description 10
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- 230000009471 action Effects 0.000 description 9
- 238000004891 communication Methods 0.000 description 9
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- 230000008859 change Effects 0.000 description 4
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- 238000012790 confirmation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
- G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
- H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
- H04N23/88—Camera processing pipelines; Components thereof for processing colour signals for colour balance, e.g. white-balance circuits or colour temperature control
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2215/00—Special procedures for taking photographs; Apparatus therefor
- G03B2215/05—Combinations of cameras with electronic flash units
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Studio Devices (AREA)
- Color Television Image Signal Generators (AREA)
- Exposure Control For Cameras (AREA)
- Stroboscope Apparatuses (AREA)
Abstract
The present invention provides camera head, it is characterised in that have: image pickup part, and subject is imaged；Operating portion, provides shooting instruction to above-mentioned image pickup part；Display part, is shown on display medium by the 1st image, and the 1st image is that above-mentioned image pickup part carries out the image in the process imaged under the 1st light source；Record portion, recorded in storage medium by the 2nd image, and the 2nd image is the image that shooting indicates, above-mentioned image pickup part images under the 2nd light source and obtains according to aforesaid operations portion；Photography conditions configuration part, when above-mentioned 1st light source is different with above-mentioned 2nd light source, sets the 1st photography conditions for above-mentioned 1st image and the 2nd photography conditions for above-mentioned 2nd image respectively；And photography conditions control portion, control the photography conditions of above-mentioned image pickup part, so that above-mentioned 1st image being imaged, under above-mentioned 2nd photography conditions, above-mentioned 2nd image being imaged under above-mentioned 1st photography conditions set by above-mentioned photography conditions configuration part.
Description
Technical field
The present invention relates to camera head.
Background technology
In recent years electron camera, at display but not optical finder shows the dynamic image (being called instant viewfinder image) photographed successively, so as to confirm the state of subject and composition.(such as, with reference to Japanese Unexamined Patent Publication 2004-77517 publication)
But, in existing electron camera, when the photography of instant viewfinder image and during the photography of rest image (being called formal photographs), all photograph with identical conditions of exposure and white balance gains, therefore, particularly when photographs formal with photoflash photography, the problem that the performance (on bodyguard, Ga り tool closes) (brightness, color matching etc.) of instant viewfinder image and formal photographs is different can be produced.
Summary of the invention
The camera head of the present invention is characterised by possessing: image pickup part, and subject is imaged；Operating portion, provides shooting instruction to above-mentioned image pickup part；Display part, is shown on display medium by the 1st image, and the 1st image is that above-mentioned image pickup part carries out the image in the process imaged under the 1st light source；Record portion, recorded in storage medium by the 2nd image, and the 2nd image is the image that shooting indicates, above-mentioned image pickup part images under the 2nd light source and obtains according to aforesaid operations portion；Photography conditions configuration part, when above-mentioned 1st light source is different from above-mentioned 2nd light source, sets the 1st photography conditions for above-mentioned 1st image and the 2nd photography conditions for above-mentioned 2nd image respectively；And photography conditions control portion, controlling the photography conditions of above-mentioned image pickup part, so that above-mentioned 1st image being imaged under above-mentioned 1st photography conditions set by above-mentioned photography conditions configuration part, under above-mentioned 2nd photography conditions, above-mentioned 2nd image being imaged.
In accordance with the invention it is possible to alleviate the incongruity of the user of image shooting being indicated to front and back.
Accompanying drawing explanation
Fig. 1 indicates that the block diagram of the composition of the camera head 101 of present embodiment.
Fig. 2 A indicates that the explanation figure of the picture example of white balance setting menu.
Fig. 2 B indicates that the explanation figure of the picture example of white balance setting menu.
The flow chart of process when Fig. 3 indicates that the photography of the camera head 101 of embodiment.
Detailed description of the invention
Hereinafter, the embodiment of the camera head of the accompanying drawing detailed description present invention is utilized.
(composition of camera head 101)
Fig. 1 indicates that the block diagram of the composition of the camera head 101 of present embodiment.Camera head 101 has: camera lens 102；The mirror 103 of spring up type, guides the light viewfinder side from subject；Mechanical shutter 104；Imaging apparatus 105；AFE (AFE (analog front end)) 106；Frame buffer 107；TG (timing generator) 108；Camera control portion 109；Image processing part 110；Display part 111；For installing the storage card IF112 of storage card 112a；Operating portion 113；There is hot shoe (hotshoe) 114a and the flash lamp IF114 of X contact (synchronous terminal) 114b；Camera lens IF115；Memorizer 116.
Additionally, camera lens 102 includes lens control portion 102a, the battery of lens 102b that is made up of condenser lens, zoom lens etc. and aperture 102c.Lens control portion 102a is connected with camera control portion 109 via camera lens IF115, the range information from focusing lens positions to subject exports camera control portion 109, and makes aperture 102c opening and closing according to the instruction in camera control portion 109.
Here, the camera head 101 of present embodiment is the electron camera with following function, namely, except confirm state and the composition of subject with optical finder, additionally it is possible at the enterprising Mobile state image of display part 111, the subject image photographed successively by imaging apparatus 105 is shown that (display of immediately finding a view) confirms the state of subject.Additionally, in the following description, the image photographed by shutter steel wire thimble (release) button 303 in cameraman's push portion 113 is called formal photographs, and the image that Real-time Motion Image on display part 111 shows is called instant viewfinder image.
In Fig. 1, when cameraman observes the optical finder of camera head 101 to photograph, mirror 103 is positioned at the solid line position of Fig. 1, from the object light of camera lens 102 incidence by mirror 103 to optical finder lateral reflection.Further, if the shutter steel wire thimble button 303 in cameraman's push portion 113, then camera control portion 109 makes mirror 103 takeoff to the dotted line position of Fig. 1, make mechanical shutter 104 opening and closing with the shutter speed of regulation and with the formal photographic subject picture of imaging apparatus 105.It addition, mirror 103 has drive division in the frame described with dotted line, so as to takeoff according to the instruction in camera control portion 109 or fall.
On the other hand, when cameraman's instant viewfinder image of being shown by display part 111 of viewing is to photograph, makes mirror 103 become the state of dotted line position takeoff to Fig. 1, and make mechanical shutter 104 become open state.Further, the instant viewfinder image that photographed being controlled by electronic shutter by imaging apparatus 105 in camera control portion 109 is read into frame buffer 107 via AFE106.Repeat this series of actions with the frame rate of regulation, show (instant viewfinder image) at display part 111 enterprising Mobile state image.Cameraman watches the instant viewfinder image shown by display part 111 and confirms the state of subject, photography composition etc., and the shutter steel wire thimble button 303 in push portion 113.If pressing shutter steel wire thimble button 303, then camera control portion 109 makes mechanical shutter 104 shutter speed opening and closing with regulation after temporary close, thus with the formal photographic subject picture of imaging apparatus 105.
The photodiode assorted about imaging apparatus 105, RGB configures with two dimension shape at sensitive surface, exports the signal of telecommunication of the size corresponding with the light quantity inciding photodiode to AFE106.
AFE106, carries out level (level) according to the gain indicated from camera control portion 109 to the signal of telecommunication that the RGB that exports from imaging apparatus 105 is assorted and adjusts.Further, the analog electrical signal A/D after level adjustment is converted to numerical data and is read into frame buffer 107.
Frame buffer 107 is made up of volatibility high-speed memory etc..Frame buffer 107 be also act as when image processing part 110, camera control portion 109 carries out image procossing, white balance process etc. time process buffer, the view data after process is also held in frame buffer 107.
TG108 exports timing signal according to the instruction (the exploring degree etc. of image such as read from imaging apparatus 105) in camera control portion 109 to each portion.Such as, TG108 exports: for reading the timing signal of picture signal from imaging apparatus 105, for being carried out the timing signal of A/D conversion by AFE106, and for writing the timing signal etc. of view data to frame buffer 107.
Camera control portion 109, by the CPU of action is constituted according to the program code being stored in advance in inside or memorizer 116, controls the action of camera head 101 entirety according to the operation of the various operation buttons arranged at operating portion 113.Composition as the camera control portion 109 relevant to present embodiment, such as it is shown in figure 1, at least have light emitting control 150, flash lamp identification part 151, shot information obtaining section 152, photography conditions configuration part 153, photography conditions control portion 154, diaphragm control unit 155 and shutter control portion 156.Additionally, photography conditions configuration part 153 is made up of the exposure calculating portion 153a calculating and setting conditions of exposure and white balance (WB) the calculating part 153b calculating and setting white balance gains.Equally, photography conditions control portion 154 by controlling f-number and shutter speed etc. so as to the exposure control unit 154a of set conditions of exposure and photographs is multiplied by white balance (WB) the control portion 154b of set white balance gains constitutes during photography.
Such as, exposure calculating portion 153a according to being read into the temporary photographing image of frame buffer 107, instant viewfinder image carry out the setting etc. of the setting of f-number, shutter speed.Further, exposure control unit 154a controls the f-number calculated for diaphragm control unit 155 is carried out instruction, and then controls the shutter speed calculated for shutter control portion 156 is carried out instruction, thus carrying out the photography of instant viewfinder image, formal photographs.Equally, WB calculating part 153b, correspondingly sets white balance gains, WB control portion 154b with the white balance mode illustrated afterwards, set white balance gains is multiplied by the instant viewfinder image being read in frame buffer 107, formal photographs, carries out blank level adjustment.
In addition, flash lamp identification part 151 obtains the information such as the model of flash lamp 201a, guide number (guidenumber) when hot shoe 114a is connected to flash lamp 201a, and shot information obtaining section 152 obtains the range information from camera lens 102 to subject.Or, when not knowing to connect with or without flash lamp, flash lamp identification part 151 is luminous to light emitting control 150 instruction, and light emitting control 150 tentatively exports luminous triggering via flash lamp IF114 to hot shoe 114a, X contact 114b.Further, according to the brightness flop of temporary photographing image now photographed, rectangular histogram etc., flash lamp identification part 151 judges that actually whether flash lamp is luminous, thus confirming the presence or absence that flash lamp connects.
So, camera control portion 109 controls the action of camera head 101 entirety.
The image processing part 110 instant viewfinder image to being read in frame buffer 107, formal photographs carry out the image procossing of the regulation from camera control portion 109 instruction.Such as, color interpolation process, edge enhancement process or image Compression etc. are carried out.Here, in the present embodiment so that carry out white balance process with camera control portion 109 but it also may carry out with image processing part 110.Or, it is also possible to it is carry out the computing of white balance gains with camera control portion 109, carries out the multiplication process of white balance gains for the view data photographed with image processing part 110.Or, it is possible to so that image processing part 110 and camera control portion 109 are combined into one processes block.
Display part 111 is made up of such as liquid crystal display etc..Further, display part 111 shows the menu screen exported by camera control portion 109, instant viewfinder image or formal photographs etc..
Storage card IF112 provides the interface that recorded the storage card 112a as detachable storage medium for the formal photographs exported in camera control portion 109.Or, when operating portion 113 have selected the reproduction mode of photographs, storage card IF112 reads the view data being saved in storage card 112a and exports camera control portion 109, and read-out image slices is shown by camera control portion 109 on display part 111.
Operating portion 113, is made up of operation button classes such as power knob 300, (LV) button 301 of immediately finding a view, preview (PV) button 302, shutter steel wire thimble button 303, tracking cross (cursor) button 304 and menu buttons 305.Cameraman utilizes these operation push-botton operation camera heads 101, and the operation information of these operation buttons is output to camera control portion 109.Further, camera control portion 109, according to the operation information inputted from operating portion 113, controls the action of camera head 101 entirety.
Here, Fig. 1 only describes the button class required for present embodiment, but the operation button all of operating portion 113 that operates required for the common video cameras such as the setting of shutter speed and f-number etc., sensitivity setting or photograph mode scale (dial) carries out.It addition, tracking cross button 304 is made up of the OK button of up and down 4 cursor buttons and central authorities.
Such as, if cameraman presses menu button 305, then show on display part 111 multiple menu item (white balance setting menu, photographs exploring degree set menu etc.), select the menu item set with the cursor button of tracking cross button 304.And, for instance, when have selected white balance setting menu as menu item, as shown in Fig. 2 A or Fig. 2 B, display part 111 shows white balance setting menu.It addition, describe in detail later about white balance setting menu.Additionally, present embodiment shows various setting menu on display part 111 but it also may be arranged to carry out the special small-sized liquid crystal display part of various setting.
Flash lamp IF114 provides the interface between hot shoe 114a and X contact 114b and camera control portion 109.Such as, camera control portion 109, read the information of the flash lamp 201a being connected to hot shoe 114a via flash lamp IF114, and control the luminous quantity of flash lamp 201a.Or, camera control portion 109 merely makes the X contact on hot shoe 114a and X contact 114b break-make (onoff).
Further, it enables flash lamp 201a etc. can be installed at hot shoe 114a place, and flash lamp 201b etc. can be connected at X contact 114b place cable.Additionally, hot shoe 201a has communication contacts and X contact, when the flash lamp that can communicate via communication contacts, it is possible to read the information such as model, guide number from camera head 101 side.Or, it is possible to the luminous quantity etc. of flash lamp 201a is controlled from camera head 101 side.But, when flash lamp 201a be do not have communication function and be only connected with the X contact on hot shoe 201a type, can only carry out making the control of illuminated switch (onoff) in the same manner as the flash lamp 201b being connected to X contact 201b.It addition, make camera control portion 109 cannot confirm the presence or absence of the luminous front installation without the flash lamp 201a of communication function, flash lamp 201b in circuit.
Camera lens IF115 is the interface between the lens control portion 102a and the camera control portion 109 of camera head 101 of tradable camera lens 102.Such as, camera lens IF115 is made up of the communication terminal that control signal carries out input and output, this control signal is used for, make camera control portion 109 read to information such as the power supply feeding terminal of camera lens 102, the model of camera lens 102, focusing lens positions (being equivalent to the range information to subject), and indicate f-number from camera control portion 109 to camera lens 102.
Memorizer 116 is made up of non-volatile flash memory etc..Memorizer 116 preserves parameter necessary to the control in the program code in camera control portion 109, each portion etc..It addition, these parameters are suitably changed according to the setting menu of display on display part 111.
It is above the basic comprising of camera head 101.It follows that the white balance mode used in the camera head 101 of present embodiment is described.
[white balance mode of camera head 101]
The camera head 101 of present embodiment has artificial white balance (MWB), presets (preset) white balance (PWB) and AWB (AWB) these three white balance mode, and cameraman can select.Such as, cameraman presses the operation button the menu button 305 of 113 and is shown on display part 111 by white balance setting menu.
Here, utilize Fig. 2 that the example of white balance setting menu is described.Fig. 2 A represents the example of selection (selection of the WB) menu of white balance mode.It addition, when Fig. 2 A, set white balance mode is applicable to formal photographs.Additionally, Fig. 2 B represent not only white balance mode selection (selection of WB), can also to the example of the white balance setting menu that the image (WB is suitable for image: formal photographs or instant viewfinder image) being suitable for the white balance mode selected is set.
In Fig. 2 A and Fig. 2 B, from AWB pattern (AWB (AWB1, AWB2)), artificial white balance mode (MWB), preset these 3 kind apoplexy due to endogenous wind selection white balance modes of white balance mode (PWB).And then, when MWB, select the kind at pre-prepd light source (flash lamp, incandescent lamp bulb, fluorescent lamp, fine day, cloudy day etc.).It addition, describe in detail later about AWB1, AWB2.
Such as, in the white balance setting menu of Fig. 2 A or Fig. 2 B, cameraman utilizes the tracking cross button 304 of operating portion 113 to carry out WB and selects operation 304a, thus the white balance mode selected from balloon window (blow I and go out) 401a (AWB, PWB and MWB (kind of light source)) is shown in selection window 401.If cameraman presses the OK button of tracking cross button 304 in this state, then it is set in selection window 401 white balance mode of display.The example of Fig. 2 A or Fig. 2 B sets MWB (flash lamp), selection window 401 is shown as " MWB (flash lamp) ".So, cameraman sets white balance mode.
In addition, in the white balance setting menu of Fig. 2 B, cameraman utilizes the tracking cross button 304 of operating portion 113 to carry out WB object images assigned operation 304b, thus the applicable image of the white balance mode selected from balloon window 402a (formal photographs or instant viewfinder image) is shown in selection window 402.If cameraman presses the OK button of tracking cross button 304 in this state, then selection window 401 set white balance mode be applied in selection window 402 represent image.In the example of Fig. 2 B, select formal photographs, selection window 402 is shown as " formally photography ".
So, namely the camera head 101 of present embodiment can only carry out the selection of white balance mode as shown in Figure 2 A, it is also possible to can set the applicable image of the white balance mode selected as shown in Figure 2 B.It addition, the situation of Fig. 2 A is equivalent to select in Fig. 2 B the situation of " formally photography ", the white balance mode being selected is only fixing is applicable to formal photographs.
Here, each white balance mode is briefly described.
(artificial white balance mode (MWB))
Under WMB, user selects the kind of the directly inputting of light source information (color temperature information etc.), light source (electric filament lamp, fluorescent lamp, fine day, cloudy day etc.), according to selected light source, utilize the white balance gains kept in advance by each light source.It addition, be pre-stored in bin 116 with light source information, white balance gains that light source is corresponding.
(presetting white balance mode (PWB))
Under PWB, the subject of the netrual colours such as gray scale plate (グ レ mono-plate) is carried out temporary photographing by user before photography, the view data obtained from temporary photographing asks for white balance gains, the white balance gains obtained is maintained in bin 116 and is multiplied by view data during photography, carries out blank level adjustment.It addition, the subject of netrual colour is carried out temporary photographing and asks for white balance gains under actual light source due to user before photography by default white balance, therefore, it is possible to carry out high-precision blank level adjustment.
(AWB pattern (AWB))
Under AWB, user does not carry out the operation relevant with blank level adjustment especially, automatically estimate the kind of light source when photography from the view data being read into frame buffer 107, ask for the white balance gains corresponding with the light source deduced, view data is carried out multiplying and carries out blank level adjustment.
It addition, in the present embodiment, when instant viewfinder image is used AWB, it is possible to select 2 AWBs.It reason for this is that, when estimating the light source such as incandescent lamp bulb under the AWB of conventional electron camera, carries out blank level adjustment so that becoming rubescent image wittingly.This is because, if suitably adjusting white balance, the atmosphere of bulb can be damaged.Therefore, moulding glisten (modelinglight) if etc. incandescent lamp bulb light source under photograph with AWB instant viewfinder image process in the formal photographs of photoflash photography; the color matching between instant viewfinder image and formal photographs could differ widely.As a result, produce cameraman to observe instant viewfinder image and cannot confirm the such problem of performance of formal photographs.Therefore, in the camera head 101 of present embodiment, it is provided with the 1st AWB pattern (AWB1) and the 2nd AWB pattern (AWB2), 1st AWB pattern makes to become wittingly when photography under the light sources such as incandescent lamp bulb rubescent image, even if the 2nd AWB pattern is also carried out suitable blank level adjustment when photography under the light sources such as incandescent lamp bulb.Further, according to the recognition result of flash lamp identification part 151, AWB when instant viewfinder image is automatically photographed by camera control portion 109 is set to AWB1 or AWB2.It addition, in the present embodiment, except needing the situation of differentiation AWB1 and AWB2 especially, it is called the AWB referring to common white balance mode.
Here, illustrate to ask for the process (white balance computing) of white balance gains when AWB, PWB.The netrual colour part of the image (temporary photographing image, instant viewfinder image etc.) being read into frame buffer 107 is extracted in the photography conditions configuration part 153 (WB calculating part 153b) in camera control portion 109, asks for white balance gains according to the view data of this netrual colour part.Such as, first estimate the chrominance section of image, ask for the meansigma methods Ra of view data assorted for RGB of this part, Ga, Ba respectively.Further, R (red), B (indigo plant) assorted white balance gains (gainR, gainB) is calculated for benchmark by (formula 1) and (formula 2) with G (green).
GainR=Ga/Ra (formula 1)
GainB=Ga/Ba (formula 2)
It addition, when MWB, also set the white balance gains that the light source selected by setting menu with white balance mode illustrated in fig. 2 is corresponding.In the case, in bin 116 grade, storage has the table being mapped by light source in advance with white balance gains, and the WB calculating part 153b of photography conditions configuration part 153 sets white balance gains with reference to the table of bin 116.
[setting of photoflash photography and white balance mode]
It follows that the setting of photoflash photography and white balance mode is described.The WB calculating part 153b of photography conditions configuration part 153, such as, when using flash lamp when formal photography is identified in flash lamp identification part 151, the white balance mode immediately found a view when photographing independently is set as AWB2 by the setting with the white balance mode of formal photographs.Cameraman thus, it is also carried out not rubescent suitable blank level adjustment when instant viewfinder image being photographed with moulding flash of light, so can pass through display part 111 and confirm the instant viewfinder image identical with the formal photographs color matching of photoflash photography.
On the contrary, when not using flash lamp when formal photography is identified in flash lamp identification part 151, the white balance setting immediately found a view when photographing is set as the white balance setting identical with white balance setting when formally photographing by the WB calculating part 153b of photography conditions configuration part 153.Such as, when white balance setting during formal photography is AWB1, the white balance setting found a view when photographing is also set to AWB1 immediately.Additionally, white balance setting during formal photography selects MWB (incandescent lamp bulb) or PWB (making photograph netrual colour image under incandescent lamp bulb and preset white balance gains), immediately the white balance setting found a view when photographing is set as AWB2 so that leave the atmosphere of incandescent lamp bulb.Or, the white balance setting immediately found a view when photographing is set as the MWB (incandescent lamp bulb) identical with white balance setting when formally photographing or PWB.
So, cameraman can pass through the instant viewfinder image that display part 111 confirmation is identical with formal photographs color matching.
[setting of conditions of exposure]
Next the setting of conditions of exposure is described.Conditions of exposure is set by the exposure calculating portion 153a of photography conditions configuration part 153, is set to identical conditions of exposure when formal photographs and the instant viewfinder image of photographing under same light source.Additionally, photograph under different light sources when formal photographs and instant viewfinder image (situation of the formal photographs of such as photoflash photography), set the conditions of exposure of instant viewfinder image with AE (automatic exposure).Conditions of exposure about formal photographs now, when flash lamp identification part 151 can obtain flashlight information according to the ranging information of the light quantity of flash lamp and camera lens 102 to set suitable conditions of exposure, tentatively make when flash lamp identification part 151 cannot obtain flashlight information flash lamp luminous and carry out temporary photographing, calculate suitable conditions of exposure from temporary photographing image.
Instant viewfinder image and formal photographs in such manner, it is possible to photograph with suitable exposure.
[spectrum assignment during temporary photographing]
Next spectrum assignment during temporary photographing is described.When tentatively make flash lamp luminous and photograph temporary photographing image, flash lamp identification part 151 makes the aperture that aperture 102c is little when being photograph than instant viewfinder image, the electronic shutter speed being made imaging apparatus 105 by shutter control portion 156 is fast, carries out temporary photographing with the photography conditions of muting sensitivity compared with during photography with instant viewfinder image.
Such as, diaphragm control unit 155 is carried out instruction so that f-number is little aperture by flash lamp identification part 151.The diaphragm control unit 155 receiving this instruction controls the lens control portion 102a of camera lens 102 so that the f-number of aperture 102c is little via camera lens IF115.
The reason making the photography conditions that the photography conditions that photography conditions is the instant viewfinder image of remolding sensitivity of temporary photographing image is low like this is in that, the luminous quantity of ordinary flash lamp is bigger than the luminous quantity of the light sources such as the moulding flash of light of instant viewfinder image of photographing, if therefore make flash lamp luminescence to temporary photographing image of photographing with the photography conditions identical with the photography of instant viewfinder image in statu quo, then temporary photographing image exposure is excessive and saturated.If temporary photographing image exposure is excessively, causing obtaining rectangular histogram, not only the presence or absence judgement of flash lamp can become difficult, asks for conditions of exposure, white balance gains accurately and also can become difficult.Therefore, in the camera head 101 of present embodiment, when tentatively make flash lamp luminous and photograph temporary photographing image, be set as the photography conditions low with the photography conditions phase specific sensitivity of instant viewfinder image.
It addition, the reducing amount of f-number during about this temporary photographing, shutter speed etc., it is possible to preset fixed value but it also may utilized each operation button of operating portion 113 freely to be set by reducing amount setting operation 304c by user.In this case, user carries out reducing amount setting operation 304c, carries out making f-number reduce by 3 grades of amounts, making shutter speed accelerate the setting of 2 grades of amounts etc..Such as, when the aperture of instant viewfinder image is 5.6, carries out following grade and process, it may be assumed that the aperture making formal photographs is 11, and from 1/125, the shutter speed of instant viewfinder image is set as 1/1000.
So, in the camera head 101 of present embodiment, due to temporary photographing image will not be over-exposed photograph, therefore, it is possible to reliably carry out the presence or absence judgement of flash lamp, and then conditions of exposure, white balance gains can be asked for accurately from temporary photographing image.
[recognition methods with presence or absence of flash lamp connection]
Next illustrate to identify the method whether camera head 101 is connected to flash lamp.
(1) situation (situation about can communicate) of the information of flash lamp can be obtained with flash lamp
Being installed on the flash lamp 114a of hot shoe 114a when can communicate with camera control portion 109 via the communication terminal of hot shoe 114a and flash lamp IF113, the information such as the model of flash lamp 114a, guide number can be read in the flash lamp identification part 151 in camera control portion 109 from flash lamp 114a.Thus, the exposure calculating portion 153a of photography conditions configuration part 153 can learn the light quantity of flash lamp 114a.
In this case, the WB calculating part 153b of photography conditions configuration part 153 sets white balance gains corresponding with the model of flash lamp 114a.It addition, in bin 116, storage has the white balance gains corresponding with the model of each flash lamp.
In addition, the exposure calculating portion 153a of photography conditions configuration part 153, the range information to subject (ranging information) obtained from camera lens 102 with shot information obtaining section 152 by the luminous quantity of the flash lamp 114a obtained from guide number is mapped and calculates optimum conditions of exposure.Here, ranging information obtains from the focusing position of the condenser lens of exchange camera lens 102, and therefore the shot information obtaining section 152 in camera control portion 109 reads ranging information via lens control portion 201 and camera lens IF115.It addition, by AF action, artificial focus operations, focus is mated with subject.
So, when the information of flash lamp can be obtained (situation about can communicate with flash lamp), it is possible to set the photography conditions being best suited for formal photographs according to these information.
(2) situation (situation about cannot communicate) of the information of flash lamp cannot be obtained with flash lamp
On the other hand, the flash lamp 114b being connected with X contact 114b via cable is the flash lamp only merely carrying out switching, and therefore side, camera control portion 109 cannot be detected and be connected to this situation of flash lamp 201b at X contact 114b.Or, even being installed on the flash lamp 114a of hot shoe 114a, there is also the communication terminal not utilizing hot shoe 114a and the type being only connected with the X contact of hot shoe 114a.In this case, the flash lamp 114a being connected with hot shoe 114a also cannot be detected in side, camera control portion 109.
Therefore, in the camera head 101 of present embodiment, light emitting control 150 is provided the luminous instruction of flash lamp by flash lamp identification part 151, and light emitting control 150 tentatively makes the X contact on the X contact 114b of flash lamp IF114, hot shoe 114a connect (on).Thus, luminous when being connected to certain flash lamp with hot shoe 114a, X contact 114b.Further, now judge according to the change of the lightness of the temporary photographing image being read in frame buffer 107 or rectangular histogram.Such as, if the luminance difference of the image of interim luminous front and back is more than threshold value set in advance, it is judged as there is flash lamp, if the luminance difference of the image before and after interim luminescence is not up to threshold value set in advance, is judged as flashless lamp.Or, indicate whether that what the distinctive characteristic of flash lamp judged flash lamp is connected to nothing according to rectangular histogram.
It addition, about interim luminescence, it is possible to it is set to the action when cameraman presses PV button 302, it is also possible to be set to because being half pressed against shutter steel wire thimble button or pressing AF button etc. and action.Or, it is also possible to it is when camera control portion 109 cannot confirm the connection of flash lamp when instant viewfinder mode starts, automatically carry out interim luminescence.Here, about carrying out temporary photographing image that is interim luminous and that photograph, as described above, by will not over-exposed in the way of f-number reduced the reducing amount of regulation or shutter speed improved, photograph.
So, the presence or absence that identification blink lamp in flash lamp identification part 151 connects.Particularly, when camera head 101 of present embodiment, when the presence or absence that flash lamp connects is not clear, the temporary photographing image photographed according to interim luminescence judges the presence or absence of the connection of flash lamp, also therefore is able to the presence or absence that reliably identification blink lamp connects when being connected to the flash lamp that cannot be carried out communication.Further, in this case, photography conditions configuration part 153 calculates according to temporary photographing image and sets the photography conditions being best suited for formal photographs.
[photograph processing of camera head 101]
It follows that utilize the flow chart of Fig. 3 to describe the photograph processing of camera head 101 in detail.It addition, the flow chart of Fig. 3 is to illustrate while showing instant viewfinder image while the flow process of process when photography, the process that camera control portion 109 carries out according to the program being stored in advance in inside or memorizer 116 at display part 111.
(step S101) if the power knob 300 in cameraman's push portion 113, the then power supply opening of camera head 101, camera control portion 109 reads the initial setting being stored in advance in the parameter class in bin 116 and carry out each portion of camera head 101, is set to cameraman and can use the state of camera head 101.
(step S102) if LV (the immediately finding a view) button 301 in cameraman's push portion 113, then camera control portion 109 makes the photographing actions of instant viewfinder image start.
The flash lamp identification part 151 in (step S103) camera control portion 109 is confirmed whether to communicate with the flash lamp 114a of hot shoe 114a via flash lamp IF113.Advance to step S106 when communicating, advance to step S104 when communicating.Here, about whether the confirmation that can communicate, for instance tentatively export the read output signal of regulation via the communication terminal of hot shoe 114a, according to whether have response and judge.
(step S104) flash lamp identification part 151 tentatively exports flash lamp luminescence via flash lamp control portion 150 and flash lamp IF113 and triggers (making the triggering that the X contact on X contact 114b and hot shoe 114a is connected), and the image (temporary photographing image) now photographed is read in frame buffer 107.It addition, when photography temporary photographing image, as described above, f-number, shutter speed etc., according to reducing amount set in advance, are set as the photography conditions of muting sensitivity side by cameraman, it is to avoid over-exposed during flash lamp luminescence.
The presence or absence that the flash lamp identification part 151 in (step S105) camera control portion 109 judges flash lamp according to the temporary photographing image being read in frame buffer 107.It addition, determination methods is described above with presence or absence of flash lamp.
The conditions of exposure (exposure calculating portion 153a) when formally photographing is asked for according to the temporary photographing image being read into frame buffer 107 in step S105 in the photography conditions configuration part 153 in (step S106) camera control portion 109.Additionally, when white balance setting during formal photography is AWB, also calculate the white balance gains (WB calculating part 153b) during formal photography.
Such as, exposure calculating portion 153a asks for the lightness (Bv value) of temporary photographing image by common light-metering computing, asks for and has how many deviations between suitable Bv value.Further, sensitivity, f-number and shutter speed are set so that the deviation of Bv value eliminates.It addition, these values are set according to photograph mode (aperture priority, Shutter speed priority etc.).Such as, when the photograph mode of aperture priority, setting shutter speed so as to suitable Bv value, when the photograph mode of Shutter speed priority, setting f-number is so as to suitable Bv value.
It addition, about the computing of the white balance gains carried out of the WB calculating part 153b when AWB sets, as described above, ask for white balance gains in the way of making the netrual colour part of temporary photographing image become netrual colour.AWB now is equivalent to the aforesaid AWB2 not carrying out and having a mind to revise.
Instant viewfinder image is read in frame buffer 107 by (step S107) camera control portion 109.
The instant viewfinder image being read into frame buffer 107 is carried out light-metering computing by the photography conditions configuration part 153 (exposure calculating portion 153a) in (step S108) camera control portion 109.About light-metering computing, as illustrated in step s 106, carry out in this instant viewfinder image to being read into frame buffer 107.
According to the light-metering operation result of step S108, the photography conditions configuration part 153 (exposure calculating portion 153a) in (step S109) camera control portion 109 differentiates whether the instant viewfinder image being read into frame buffer 107 is photographed with correct exposure.Here, about the differentiation of correct exposure, according to whether the deviation of Bv value as described above carries out in threshold value set in advance, the deviation of Bv value is in threshold value, it is judged as YES correct exposure.Advance to step S111 when correct exposure, advance to step S110 when inappropriate exposure.
The photography conditions configuration part 153 (exposure calculating portion 153a) in (step S110) camera control portion 109 is changed conditions of exposure and returns step S107.Change about conditions of exposure, for instance at least change at least one in f-number or electronic shutter speed.
Here, photograph with default conditions of exposure when the starting of instant viewfinder image, but be not necessarily limited to become correct exposure, therefore, be repeatedly performed and be controlled with becoming correct exposure to the process of step S110 from step S107.
The white balance gains (white balance computing) of instant viewfinder image is asked in the photography conditions configuration part 153 (WB calculating part 153b) in (step S111) camera control portion 109 with AWB.Here, as described abovely, WB calculating part 153b, when the formal photographs of photoflash photography with the AWB2 instant viewfinder image of photography, when formal photographs photographed by non-flash lamp with the AWB1 instant viewfinder image of photography.
The photography conditions control portion 154 (WB control portion 154b) in (step S112) camera control portion 109 carries out the blank level adjustment of the instant viewfinder image being read in frame buffer 107.Here, blank level adjustment refers to, with the R component of view data and B component, the white balance gains (gainR, gainB) obtained in step S111 is carried out the process of multiplying respectively.Thus, the instant viewfinder image being read in buffer 107 is carried out blank level adjustment, is shown to display part 111 by camera control portion 109.
So, processing from step S107 to step S112 is shown in period of display part 111 in instant viewfinder image and is repeatedly executed at predetermined intervals, by be identical with formal photographs color matching by blank level adjustment instant viewfinder image be shown to display part 111.This series of processes until pressing shutter steel wire thimble button 303 and being repeatedly performed in following step S113.
(step S113) camera control portion 109 discriminates whether to press the shutter steel wire thimble button 303 of operating portion 113.Advance to step S114 when pressing shutter steel wire thimble button 303, return step S107 when not pressing shutter steel wire thimble button 303.
Formally photograph in (step S114) camera control portion 109 under the photography conditions (conditions of exposure and white balance gains) set before.Here, the photography conditions before set refers to, utilizes conditions of exposure and the white balance gains of the formal photographs obtained in step s 106, utilizes the white balance gains obtained according to temporary photographing image in step s 106 when being set as AWB.
So, the camera head 101 of present embodiment, photography conditions (conditions of exposure and white balance gains) when can select to show instant viewfinder image respectively on display part 111 with photograph formal photographs time photography conditions (conditions of exposure and white balance gains), it is possible to be suitable for the conditions of exposure of each image and white balance gains and photograph.Particularly, the camera head 101 of present embodiment, the white balance gains of instant viewfinder image is selected, therefore, it is possible to the image that performance is identical with formal photographs is shown on display part 111 as instant viewfinder image according to whether the formal photographs of photoflash photography.Thus, cameraman can not only observe the instant viewfinder image of display on display part 111 and confirm focus (ピ Application ト), composition, additionally it is possible to confirming the performance of formal photographs, convenience is improved.
Additionally, in the above-described embodiment, when white balance gains is AWB, from photographs, extract netrual colour part and ask for white balance gains, it may also be, when having confirmed as flash lamp by interim luminescence, it determines whether there is the color close with the illuminant color of XE pipe (xenon lamp) in temporary photographing image and set white balance gains.In this case, the WB calculating part 153b of photography conditions configuration part 153, when there is the region of the color close with the illuminant color of XE pipe in temporary photographing image, asks for white balance gains so that the white balance of color in this field is suitable.On the contrary, when being absent from the region of the color close with the illuminant color of XE pipe in temporary photographing image, set white balance gains matchingly with the illuminant color of XE pipe set in advance.Thereby, it is possible to the white balance gains of the illuminant color of the XE pipe setting the light source being most suitable as flash lamp and adopting.
In addition, in the above description, formal photographs is set white balance gains with MWB or PWB, instant viewfinder image is set white balance gains with AWB, it may also be, set by user, instant viewfinder image is set white balance gains with MWB or PWB, formal photographs is set white balance gains with AWB.
Above, each embodiment illustrates the camera head of the present invention, but can implement with other variforms on without departing from its spirit and principal character ground.Therefore, each point of above-mentioned embodiment is simply as illustration, and makes an explanation with limiting.The present invention is illustrated by scope of the claims, and the present invention is not limited to description text completely.Further, the deformation and the change that belong to the equivalency range of right are all contained in the scope of the present invention.
Claims (8)
1. a camera head, it is characterised in that have:
Image pickup part, images subject；
Operating portion, provides shooting instruction to above-mentioned image pickup part；
Display part, is shown on display medium by the 1st image, and the 1st image is that above-mentioned image pickup part carries out the image in the process imaged under the 1st light source；
Record portion, recorded in storage medium by the 2nd image, and the 2nd image is the image that shooting indicates, above-mentioned image pickup part images under the 2nd light source and obtains according to aforesaid operations portion；
Photography conditions configuration part, when above-mentioned 1st light source is different with above-mentioned 2nd light source, sets the 1st photography conditions for above-mentioned 1st image and the 2nd photography conditions for above-mentioned 2nd image respectively；And
Photography conditions control portion, controls the photography conditions of above-mentioned image pickup part, so that above-mentioned 1st image being imaged, under above-mentioned 2nd photography conditions, above-mentioned 2nd image being imaged under above-mentioned 1st photography conditions set by above-mentioned photography conditions configuration part,
This camera head is provided with flasher identification part, when the flasher that above-mentioned 2nd light source flashes when being to above-mentioned 2 image photography, this flasher identification part is the presence or absence of the installation of identification blink device by the information acquirement of above-mentioned flasher or the test luminescence of above-mentioned flasher
When the installation that above-mentioned flasher identification part can identify above-mentioned flasher by the information that obtains from above-mentioned flasher, above-mentioned photography conditions configuration part sets above-mentioned 1st photography conditions and above-mentioned 2nd photography conditions according to the information of above-mentioned flasher
Above-mentioned flasher identification part is when failing to understand from the connection of above-mentioned flasher acquirement information or above-mentioned flasher, the presence or absence of the installation of above-mentioned flasher is identified by the test luminescence of above-mentioned flasher, when be identified as there is above-mentioned flasher, above-mentioned photography conditions configuration part utilizes above-mentioned test temporary photographing image luminous, that obtain according to being imaged by above-mentioned image pickup part, sets above-mentioned 1st photography conditions and above-mentioned 2nd photography conditions.
2. camera head as claimed in claim 1, it is characterised in that
Above-mentioned 1st image is the instant viewfinder image being shown on above-mentioned display medium when for confirming subject, and above-mentioned 2nd image is recorded on the rest image of formally photographing in above-mentioned storage medium.
3. camera head as claimed in claim 1, it is characterised in that
Above-mentioned 1st photography conditions and above-mentioned 2nd photography conditions are conditions of exposure and white balance gains.
4. the camera head as according to any one of claims 1 to 3, it is characterised in that
Above-mentioned photography conditions configuration part, when above-mentioned temporary photographing image is imaged, sets the photography conditions low with above-mentioned 1st photography conditions phase specific sensitivity.
5. the camera head as according to any one of claims 1 to 3, it is characterised in that
This camera head is additionally provided with reducing amount configuration part, and this reducing amount configuration part reducing amount for above-mentioned 1st photography conditions sets the photography conditions of above-mentioned temporary photographing image,
Above-mentioned photography conditions control portion, when above-mentioned temporary photographing image is imaged, above-mentioned temporary photographing image is photographed by the reducing amount set by above-mentioned reducing amount configuration part.
6. the camera head as according to any one of claims 1 to 3, it is characterised in that
Above-mentioned photography conditions configuration part, when above-mentioned flasher identification part recognizes the installation of above-mentioned flasher, any one in above-mentioned 1st photography conditions or above-mentioned 2nd photography conditions is divided into ding white ware balancing gain at default white balance mode or artificial white balance mode, another is divided into ding white ware balancing gain in AWB pattern.
7. camera head as claimed in claim 6, it is characterised in that
When using the AWB pattern automatically asking for above-mentioned white balance gains from photographs, it is provided with the 1st AWB pattern carrying out suitable blank level adjustment and does not carry out the 2nd AWB pattern the two pattern of adjustment of specific light source
Above-mentioned photography conditions configuration part, when above-mentioned flasher identification part recognizes the installation of above-mentioned flasher, ding white ware balancing gain is divided in above-mentioned 1st AWB pattern, when the unidentified installation to above-mentioned flasher in above-mentioned flasher identification part, divide into ding white ware balancing gain in above-mentioned 2nd AWB pattern.
8. camera head as claimed in claim 6, it is characterised in that
Above-mentioned photography conditions configuration part, when dividing into ding white ware balancing gain in AWB pattern, judge whether to have the color close with the illuminant color of above-mentioned flasher in above-mentioned temporary photographing image, when there being close color, set the white balance gains for this color, when the color being not close to, set the white balance gains of the illuminant color for above-mentioned flasher set in advance.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010146138A JP5152260B2 (en) | 2010-06-28 | 2010-06-28 | Imaging device |
| JP146138/2010 | 2010-06-28 |
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| CN102300038A CN102300038A (en) | 2011-12-28 |
| CN102300038B true CN102300038B (en) | 2016-07-06 |
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| JP (1) | JP5152260B2 (en) |
| CN (1) | CN102300038B (en) |
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| US8488055B2 (en) * | 2010-09-30 | 2013-07-16 | Apple Inc. | Flash synchronization using image sensor interface timing signal |
| US8836816B2 (en) * | 2011-05-19 | 2014-09-16 | Foveon, Inc. | Method of adjusting the brightness of a digital camera image |
| JP6354246B2 (en) * | 2014-03-26 | 2018-07-11 | 株式会社ニコン | IMAGING DEVICE, IMAGING DEVICE CONTROL METHOD, AND CONTROL PROGRAM |
| WO2018051699A1 (en) | 2016-09-16 | 2018-03-22 | 富士フイルム株式会社 | Image capturing device, image capturing method, and image capturing program |
| JP7026456B2 (en) * | 2017-07-05 | 2022-02-28 | キヤノン株式会社 | Image processing device, learning device, focus control device, exposure control device, image processing method, learning method, and program |
| EP3644600B1 (en) * | 2018-10-22 | 2022-06-15 | Ricoh Company, Ltd. | Imaging device, information processing method, system, and carrier means |
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| JP4127491B2 (en) | 2002-08-09 | 2008-07-30 | 株式会社リコー | Camera with auto focus function |
| JP2004140528A (en) * | 2002-10-16 | 2004-05-13 | Omron Corp | Photographing apparatus, control method thereof photographing printing apparatus, and print paper unit |
| US7388612B2 (en) * | 2002-11-26 | 2008-06-17 | Canon Kabushiki Kaisha | Image pickup apparatus and method, recording medium, and program providing user selected hue and white balance settings |
| JP2005070620A (en) * | 2003-08-27 | 2005-03-17 | Minolta Co Ltd | Imaging device and method for correcting emitted flash light quantity |
| JP4364903B2 (en) * | 2004-03-17 | 2009-11-18 | 富士通マイクロエレクトロニクス株式会社 | Automatic gain control circuit |
| JP4745876B2 (en) * | 2006-03-29 | 2011-08-10 | キヤノン株式会社 | Image processing apparatus and image processing method |
| JP2008072575A (en) * | 2006-09-15 | 2008-03-27 | Canon Inc | Image processor, method, and computer program |
| US7697062B2 (en) * | 2006-11-08 | 2010-04-13 | Sony Ericsson Mobile Communications Ab | Camera and method in a camera |
| JP2009284078A (en) * | 2008-05-20 | 2009-12-03 | Olympus Imaging Corp | Camera system and image generating method thereof |
| JP2009284079A (en) * | 2008-05-20 | 2009-12-03 | Olympus Imaging Corp | Camera system and image generating method thereof |
| CN101626457B (en) * | 2008-07-08 | 2011-09-07 | 华晶科技股份有限公司 | Image capturing method |
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| JP2012010237A (en) | 2012-01-12 |
| CN102300038A (en) | 2011-12-28 |
| US20110317992A1 (en) | 2011-12-29 |
| US8559809B2 (en) | 2013-10-15 |
| JP5152260B2 (en) | 2013-02-27 |
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